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C# List<T>.ToArray() Method with Example

C# List<T>.ToArray() Method: In this tutorial, we will learn about the ToArray() method of List collection with its usage, syntax, and an example using C# program. By IncludeHelp Last updated : April 15, 2023

C# List<T>.ToArray() Method

List<T>.ToArray() method is used to copy all list elements to a new array or we can say it is used to convert a list to an array.

Syntax

T[] List<T>.ToArray();

Parameter(s)

• None

Return Value

It returns an array of type T.

Example

int list declaration:
List<int> a = new List<int>();

Copying list elements to a new array:
int[] arr = a.ToArray();
    
Output:
arr: 10 20 30 40 50    

C# program to convert list elements to an array using List<T>.ToArray() method

using System;
using System.Text;
using System.Collections.Generic;

namespace Test {
  class Program {
    static void printList(List <int> lst) {
      //printing elements
      foreach(int item in lst) {
        Console.Write(item + " ");
      }
      Console.WriteLine();
    }

    static void Main(string[] args) {
      //integer list
      List <int> a = new List <int> ();

      //adding elements
      a.Add(10);
      a.Add(20);
      a.Add(30);
      a.Add(40);
      a.Add(50);

      //print the list
      Console.WriteLine("list elements...");
      printList(a);

      //copying list elements to a new array
      int[] arr = a.ToArray();

      //printing types
      Console.WriteLine("type of a: " + a.GetType());
      Console.WriteLine("type of arr: " + arr.GetType());

      //print the list
      Console.WriteLine("array elements...");
      foreach(int item in arr) {
        Console.Write(item + " ");
      }

      //hit ENTER to exit
      Console.ReadLine();
    }
  }
}

Output

list elements...
10 20 30 40 50
type of a: System.Collections.Generic.List`1[System.Int32]
type of arr: System.Int32[]
array elements...
10 20 30 40 50

Reference: List<T>.ToArray() Method